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Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4
51+ min ago (204+ words) Your repository tests are green. Then production throws a column “metadata” is of type jsonb but expression is of type character varying…Continue reading on Medium » Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4 Your repository tests…...
Spring Boot 4 + Java 25: 10 Things You Should Stop Doing in Your REST APIs
2+ hour, 1+ min ago (38+ words) Modernizing only works when you can say out loud what each change buys you. “It’s newer” is not a reason. I keep a …...
Build a small OpenOSRS plugin in Java
10+ hour, 42+ min ago (412+ words) A small plugin is a good way to learn a desktop client's extension system. This example displays a chat message after login. It covers discovery, dependency injection, game events and packaging without automating gameplay. I maintain the OpenOSRS project at…...
XML Configuration Mode: Decoupling Your API Catalog from Business Code
10+ hour, 14+ min ago (227+ words) In this post you'll learn to: The XML file names each request and declares its return type. The factory binds those entries to interface methods by method name. Change the curl in XML → the running app changes behavior. No Java…...
Architecting a Low-Power Geofencing Engine for Android
11+ hour, 6+ min ago (1671+ words) It happened during a quiet, mid-afternoon meeting. The room was deathly silent, the air thick with the weight of a quarterly review, when my phone decided to belt out an aggressive, high-decibel ringtone. My face turned crimson. I scrambled to…...
How Seed4J Validates Compatibility
13+ hour, 36+ min ago (279+ words) How Seed4J uses Renovate, GitHub Actions, and 25 generated project configurations to validate compatibility across modern technology stacks. Tagged with opensource, githubactions, devops, security....
Understanding == vs.equals() in Java: The Beginner's Trap That Cost Me Hours
14+ hour, 52+ min ago (134+ words) When I first started learning Java, I wrote a simple login system. The password entered by the user was exactly what was stored in the database. I looked at the screen, compared the two strings, and they were identical. Yet,…...
How Uber Handles Trillions of Kafka Messages Without Bringing Everything Down
10+ hour, 53+ min ago (23+ words) How Uber built a Kafka architecture for trillions of daily messages using federated clusters, uReplicator, Chaperone, consumer proxies, dead-letter queues, and tiered storage....
sync = true protects one JVM, not the cluster
15+ hour, 32+ min ago (209+ words) Originally published at bitsar.net. Twelve pods, one Redis, and @Cacheable(sync = true) on the method. I read that as a protected endpoint. It coordinates callers inside one JVM, so a cold key was still twelve calls to the same…...
Object-Oriented Programming in Software Engineering: Mastering the Core Concepts and How They Shape…
12+ hour, 42+ min ago (1158+ words) Object-Oriented Programming in Software Engineering: Mastering the Core Concepts and How They Shape Modern Software Development A practical guide to classes, objects, encapsulation, abstraction …...
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